TY  - JOUR
AU  - Posseik, Francois
AU  - Giovanelli, L.
AU  - Amsalem, P.
AU  - Petaccia, L.
AU  - Topwal, D.
AU  - Gorovikov, S.
AU  - Abel, M.
AU  - Koch, N.
AU  - Porte, L.
AU  - Goldoni, A.
AU  - Themlin, J.-M.
TI  - Final-state diffraction effects in angle-resolved photoemission at an organic-metal interface
JO  - Physical review / B
VL  - 84
IS  - 24
SN  - 1098-0121
CY  - College Park, Md.
PB  - APS
M1  - PreJuSER-19653
SP  - 241407
PY  - 2011
N1  - The authors acknowledge V. N. Strocov for fruitful discussions. D. Lonza is acknowledged for technical assistance during the experiments. P.A. and N.K. gratefully acknowledge financial support by the DFG.
AB  - In this paper it is shown that angle-resolved photoemission performed using low-energy photons on an organicmetal interface allows to clearly distinguish genuine interface states from features of substrate photoelectrons diffracted by the molecular lattice. As a model system an ordered monolayer of Zn-phthalocyanine is used as a diffraction lattice to probe the electronic band structure of a Ag(110) substrate. Photoemission close to normal emission geometry reveals strongly dispersive features absent in the pristine substrate spectra. Density functional theory modeling helped identifying these as bulk sp direct transitions undergoing surface-umklapp processes. The present results establish the important role of final-state diffraction effects in photoemission experiments at organic-inorganic interfaces.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000298563100001
DO  - DOI:10.1103/PhysRevB.84.241407
UR  - https://juser.fz-juelich.de/record/19653
ER  -